Thailand – Suggested Itinerary
Bangkok – Surat Thani – Koh Samui – Koh Phangan – Krabi – Koh Phi Phi – Koh Lanta – Bangkok – Ayutthaya – Lopburi – Sukhothai – Chiang Mai – Chiang Rai – Pai – Bangkok
Bangkok (Start): Capital City and starting point, you can spend here 2 nights
Surat Thani (Train or bus ): This is the dropping off point for the Eastern Islands, from here you can get a boat to either Koh Phangan or Koh Samui. If you don’t have enough time, you can skip it.
Koh Samui (Boat): From here you can easily get to Koh Phangan, Koh Tao and Ang Thong National Marine Park. This is the most popular, crowded and touristic island. If you are looking for a more tailored trip, you can skip it.
Koh Phangan (Boat): This is where the full moon party takes place. In the week approaching the party, the island will start filling up, especially in Haad Rin. Every night on the Haad Rin Nok (Full Moon Beach) sees a mini party, in anticipation for the big one. If you are going to the full moon party, book in advance or arrive some days before the party.
Krabi (Boat to Surat Thani + bus to Krabi): Krabi is a beautiful town, with a nice beach known for rock climbing and adventure activities.
Koh Phi Phi (Boat): Many travelers say this is the most beautiful island of Thailand, Koh Phi Phi Don (where you can stay) and Koh Phi Phi Leh (where The Beach was filmed) are popular with backpackers.
Koh Lanta (Boat): An island and national park known for its nine white sandy beaches. It is one of the several small islands you can choose from.
Bangkok (Overnight bus or train): You can stop and organize here your trip to the north.
Ayutthaya (Quick bus or train): With no many tourists around, Ayutthaya is kind of an island at the confluence of three rivers: the Chao Phraya river, the Lopburi river and the Pa Sak river. And the island is littered with ancient temples and religious structures. Let yourself 2 nights to explore the temples around, the floating market. You can easily explore the city by bike.
Lopburi (Short ride by train): A former Thai capital city and small town with a population of 30,000 but famous for its monkeys. It is a unique city.
Sukhothai (6 hours train from Lopburi): This city is a popular tourist destination because it is located near the ruins of the ancient city of Sukhothai. Spend a day exploring the ruins, renting a bike it’s recommended.
Chiang Mai (Train from Sukkothai or train or bus from Bangkok): Biggest city in the north, is it a great place to take a break, and organize your jungle trekings or your slow boat trip to Laos.
Chiang Rai (Bus): This is the main city in the golden triangle. Considered as a base city for exploring the surrounding landscapes.
Pai (Bus): It is a tourism-oriented town, offering a relaxed atmosphere with a broad tourist and backpacker scene. Every backpacker will recommend you this beautiful town.
Bangkok (Bus to Chiang Mai then direct train or bus to the city).
Most of the information presented above was taken from MyAlternativeLife